“When a spy sells something entirely new, all he needs to do is recount something you could find in any second-hand book stall.”

“Here he was holding the clear proof of the existence of other skies, but at the same time without having to ascend beyond the celestial spheres, for he intuited many worlds in a piece of coral. Was there any need to calculate the number of forms which the atoms of the Universe could create--burning at the stake all those who said their number was not finite--when it sufficed to meditate for years on one of these marine objects to realize how the deviation of a single atom, whether willed by God or prompted by Chance, could generate inconceivable Milky Ways?”

“We stopped to browse in the cases, and now that William - with his new glasses on his nose - could linger and read the books, at every title he discovered he let out exclamations of happiness, either because he knew the work, or because he had been seeking it for a long time, or finally because he had never heard it mentioned and was highly excited and titillated. In short, for him every book was like a fabulous animal that he was meeting in a strange land.”

“All the same,” I said, “when you read the prints in the snow and the evidence of the branches, you did not yet know Brunellus. In a certain sense those prints spoke of all horses, or at least all horses of that breed. Mustn’t we say, then, that the book of nature speaks to us only of essences, as many distinguished theologians teach?”“Not entirely, dear Adso,” my master replied. “True, that kind of print expressed to me, if you like, the idea of ‘horse,’ the verbum mentis, and would have expressed the same to me wherever I might have found it. But the print in that place and at that hour of the day told me that at least one of all possible horses had passed that way. So I found myself halfway between the perception of the concept ‘horse’ and the knowledge of an individu?al horse. And in any case, what I knew of the universal horse had been given me by those traces, which were singular. I could say I was caught at that moment between the singularity of the traces and my ignorance, which assumed the quite diaphanous form of a univer?sal idea. If you see something from a distance, and you do not understand what it is, you will be content with defining it as a body of some dimension. When you come closer, you will then define it as an animal, even if you do not yet know whether it is a horse or an ass. And finally, when it is still closer, you will be able to say it is a horse even if you do not yet know whether it is Brunellus or Niger. And only when you are at the proper distance will you see that it is Brunellus (or, rather, that horse and not another, however you decide to call it). And that will be full knowledge, the learning of the singular. So an hour ago I could expect all horses, but not because of the vastness of my intellect, but because of the paucity of my deduction. And my intellect’s hunger was sated only when I saw the single horse that the monks were leading by the halter. Only then did I truly know that my previous reasoning, had brought me close to the truth. And so the ideas, which I was using earlier to imagine a horse I had not yet seen, were pure signs, as the hoofprints in the snow were signs of the idea of ‘horse’; and sins and the signs of signs are used only when we are lacing things.”

“There are four kinds of people in this world: cretins, fools, morons, and lunatics…Cretins don’t even talk; they sort of slobber and stumble…Fools are in great demand, especially on social occasions. They embarrass everyone but provide material for conversation…Fools don’t claim that cats bark, but they talk about cats when everyone else is talking about dogs. They offend all the rules of conversation, and when they really offend, they’re magnificent…Morons never do the wrong thing. They get their reasoning wrong. Like the fellow who says that all dogs are pets and all dogs bark, and cats are pets, too, therefore cats bark…Morons will occasionally say something that’s right, but they say it for the wrong reason…A lunatic is easily recognized. He is a moron who doesn’t know the ropes. The moron proves his thesis; he has logic, however twisted it may be. The lunatic on the other hand, doesn’t concern himself at all with logic; he works by short circuits. For him, everything proves everything else. The lunatic is all idée fixe, and whatever he comes across confirms his lunacy. You can tell him by the liberties he takes with common sense, by his flashes of inspiration, and by the fact that sooner or later he brings up the Templars…There are lunatics who don’t bring up the Templars, but those who do are the most insidious. At first they seem normal, then all of a sudden…”

“Jacopo Belbo didn't understand that he had had his moment and that it would have to be enough for him, for all his life. Not recognizing it, he spent the rest of his days seeking something else, until he damned himself. ”

“A library's ideal function is to be a little bit like a bouquiniste's stall, a place for trouvailles.”